Does anybody have any ideas about replacing the original left arm cannon of OS TLK Voyager Nitro with a longer retractable/telescoping one.

The reason I ask is because I plan on buying an OS TLK Voyager Nitro and turn it into my own custom Movieverse Shockwave and one of the mods I thought about is for the left arm cannon to be retractable/telescoping so that can look longer and more menacing.